真しん珠じゅ貝がいしんじゅがいMeanings1nounpearl oysterEspecially refers to Marten's pearl oyster (Pinctada fucata martensii), also known as 阿古屋貝 (あこやがい).See also: 阿古屋貝真しん珠じゅ貝がいから美うつくしい真しん珠じゅが取とれた。A beautiful pearl was harvested from the pearl oyster.
